World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
52
Citations
7171
World Ranking
3728
National Ranking
246

Roger L. Schultz publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Roger L. Schultz sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 226 publications — 57th percentile

57% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Roger L. Schultz D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Roger L. Schultz sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 52 D-Index — 64th percentile

64% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Overview

What is he best known for?

The fields of study he is best known for:

  • Mechanical engineering
  • Electrical engineering
  • Thermodynamics

Roger L. Schultz focuses on Wellbore, Acoustics, Mechanics, Petroleum engineering and Signal. The various areas that Roger L. Schultz examines in his Wellbore study include Geotechnical engineering and Longitudinal axis. His research in Acoustics intersects with topics in Bit, Electronic engineering, Control theory and Pressure sensor.

He has included themes like Sample, Inlet and Volume in his Mechanics study. His Petroleum engineering research incorporates elements of Well control and Drilling. He interconnects Power and Optics, Interferometry in the investigation of issues within Signal.

His most cited work include:

  • Annular isolators for expandable tubulars in wellbores (349 citations)
  • Method and apparatus for placing and interrogating downhole sensors (184 citations)
  • Hydraulic control system for downhole tools (157 citations)

What are the main themes of his work throughout his whole career to date?

His primary areas of investigation include Wellbore, Mechanical engineering, Petroleum engineering, Mechanics and Acoustics. His study looks at the relationship between Wellbore and topics such as Casing, which overlap with Composite material. His study focuses on the intersection of Mechanical engineering and fields such as Structural engineering with connections in the field of Mandrel.

The Mechanics study combines topics in areas such as Sample and Volume. Roger L. Schultz has researched Acoustics in several fields, including Signal and Electrical engineering. His Signal research incorporates themes from Real-time computing and Electronic engineering.

He most often published in these fields:

  • Wellbore (23.19%)
  • Mechanical engineering (19.01%)
  • Petroleum engineering (18.63%)

What were the highlights of his more recent work (between 2010-2020)?

  • Mechanical engineering (19.01%)
  • Wellbore (23.19%)
  • Structural engineering (11.79%)

In recent papers he was focusing on the following fields of study:

Roger L. Schultz mainly investigates Mechanical engineering, Wellbore, Structural engineering, Fluid dynamics and Petroleum engineering. In general Mechanical engineering study, his work on Piston, Mechanism and Casing often relates to the realm of Section, thereby connecting several areas of interest. His Wellbore research is multidisciplinary, incorporating perspectives in Connection, Cable gland, Flow, Joint and Annulus.

His Annulus research is multidisciplinary, incorporating elements of Geotechnical engineering and Casing string. His Fluid dynamics study necessitates a more in-depth grasp of Mechanics. His Petroleum engineering study integrates concerns from other disciplines, such as Separator and Spark plug.

Between 2010 and 2020, his most popular works were:

  • Downhole Telemetry System Using an Optically Transmissive Fluid Media and Method for Use of Same (76 citations)
  • Method and apparatus for wellbore perforation (54 citations)
  • Vortex controlled variable flow resistance device and related tools and methods (37 citations)

In his most recent research, the most cited papers focused on:

  • Mechanical engineering
  • Electrical engineering
  • Thermodynamics

Roger L. Schultz focuses on Mechanical engineering, Wellbore, Structural engineering, Flow and Annulus. His Mechanical engineering research includes elements of Reset and Motion. His Wellbore research is classified as research in Petroleum engineering.

He works mostly in the field of Petroleum engineering, limiting it down to topics relating to Valve opening and, in certain cases, Flow, as a part of the same area of interest. His research in Structural engineering tackles topics such as Fluid dynamics which are related to areas like Line, Washer and Flow resistance. The study incorporates disciplines such as Casing string, Expandable tubular technology, Float, Collar and Variable flow in addition to Annulus.

Best Publications

  • Annular isolators for expandable tubulars in wellbores

    Michael M. Brezinski;Gregory B. Chitwood;Ralph H. Echols;Gary P. Funkhouser

  • Fremgangsmåte og anordning for å plassere og utspörre nedihullssensorer

    Schultz Roger Lynn;Robison Clark Edward;Bayh Iii Russell Irving;Stewart Iii Benjamin Bernhardt

  • Hydraulic control system for downhole tools

    Roger L. Schultz;Paul D. Ringgenberg;Jimmie R. Williamson

  • Vibration based power generator

    Roger L. Schultz;Robert K. Michael;Clark E. Robison;Paul D. Ringgenberg

  • Differential actuating system for downhole tools

    Roger L. Schultz;Kevin R. Manke;Neal G. Skinner

  • System for predicting changes in a drilling event during wellbore drilling prior to the occurrence of the event

    Emad B. Ibrahim;Louis W. Elrod;Christopher M. Jones;Sara Shayegi

  • SISTEMA DE POÇO E MÉTODO PARA INJETAR FLUIDO AQUECIDO USANDO POÇOS MULTILATERAIS

    Schultz Roger L;Cavender Travis W;Fipke Steven Ronald;Deshmukh Aditya Shailesh

  • Annulus pressure operated downhole choke and associated methods

    Roger L. Schultz;Kent Beck

  • Early evaluation system with pump and method of servicing a well

    Paul David Ringgenberg;Neal Gregory Skinner;Curtis Edgar Wendler;Roger Lynn Schultz

  • Self-contained downhole sensor and method of placing and interrogating same

    Roger L. Schultz;Benjamin B. Stewart;Jamie Oag;Nadir Mahjoub

  • Apparatus and method for progressively gravel packing an interval of a wellbore

    Ronald G. Dusterhoft;Syed Hamid;Roger L. Schultz;Robert Ken Michael

  • Shut-in tools

    Roger L. Schultz;Craig L. Zitterich;Harold K. Beck;William L. Bohan

  • Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator

    Roger L. Schultz;Orlando De Jesus;Andrew J. Osborne

  • Apparatus and method for creating pulsating fluid flow, and method of manufacture for the apparatus

    Roger L. Schultz;Robert K. Michael;Pete C. Dagenais;Michael L. Fripp

  • System and method for determining downhole conditions

    Roger L. Schultz;Neal G. Skinner;Pete C. Dagenais;Orlando De Jesus

  • Downhole Telemetry System Using an Optically Transmissive Fluid Media and Method for Use of Same

    Travis Cavender;Kevin Fink;Vince Zeller;Roger Schultz

  • Fiber optic sensor

    Roger L. Schultz;Neal Gregory Skinner;Harry Davis Smith;Daniel David Gleitman

  • Wellbore laser operations

    Roger L. Schultz;Loyd E. East;Harold Grayson Walters;Billy Wilson Mcdaniel

  • Internal power source for downhole detection system

    Roger L. Schultz;Orlando De Jesus;Andrew J. Osborne

  • Rechargeable energy storage device in a downhole operation

    Bruce H. Storm;Roger L. Schultz;Michael L. Fripp

Frequent Co-Authors

Michael L. Fripp
Michael L. Fripp Halliburton (United Kingdom)
Mohamed Y. Soliman
Mohamed Y. Soliman University of Houston
Jim B. Surjaatmadja
Jim B. Surjaatmadja Halliburton (United Kingdom)
Jeffrey F. Morris
Jeffrey F. Morris City College of New York

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